FFmpeg 7.1.1
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Files | |
file | csp.h |
Colorspace value utility functions for libavutil. | |
Data Structures | |
struct | AVLumaCoefficients |
Struct containing luma coefficients to be used for RGB to YUV/YCoCg, or similar calculations. More... | |
struct | AVCIExy |
Struct containing chromaticity x and y values for the standard CIE 1931 chromaticity definition. More... | |
struct | AVPrimaryCoefficients |
Struct defining the red, green, and blue primary locations in terms of CIE 1931 chromaticity x and y. More... | |
struct | AVColorPrimariesDesc |
Struct that contains both white point location and primaries location, providing the complete description of a color gamut. More... | |
Typedefs | |
typedef AVCIExy | AVWhitepointCoefficients |
Struct defining white point location in terms of CIE 1931 chromaticity x and y. | |
typedef double(* | av_csp_trc_function) (double) |
Function pointer representing a double -> double transfer function that performs an EOTF transfer inversion. | |
Functions | |
const AVLumaCoefficients * | av_csp_luma_coeffs_from_avcsp (enum AVColorSpace csp) |
Retrieves the Luma coefficients necessary to construct a conversion matrix from an enum constant describing the colorspace. | |
const AVColorPrimariesDesc * | av_csp_primaries_desc_from_id (enum AVColorPrimaries prm) |
Retrieves a complete gamut description from an enum constant describing the color primaries. | |
enum AVColorPrimaries | av_csp_primaries_id_from_desc (const AVColorPrimariesDesc *prm) |
Detects which enum AVColorPrimaries constant corresponds to the given complete gamut description. | |
double | av_csp_approximate_trc_gamma (enum AVColorTransferCharacteristic trc) |
Determine a suitable 'gamma' value to match the supplied AVColorTransferCharacteristic. | |
av_csp_trc_function | av_csp_trc_func_from_id (enum AVColorTransferCharacteristic trc) |
Determine the function needed to apply the given AVColorTransferCharacteristic to linear input. | |
typedef AVCIExy AVWhitepointCoefficients |
typedef double(* av_csp_trc_function) (double) |
const AVLumaCoefficients * av_csp_luma_coeffs_from_avcsp | ( | enum AVColorSpace | csp | ) |
Retrieves the Luma coefficients necessary to construct a conversion matrix from an enum constant describing the colorspace.
csp | An enum constant indicating YUV or similar colorspace. |
const AVColorPrimariesDesc * av_csp_primaries_desc_from_id | ( | enum AVColorPrimaries | prm | ) |
Retrieves a complete gamut description from an enum constant describing the color primaries.
prm | An enum constant indicating primaries |
enum AVColorPrimaries av_csp_primaries_id_from_desc | ( | const AVColorPrimariesDesc * | prm | ) |
Detects which enum AVColorPrimaries constant corresponds to the given complete gamut description.
prm | A description of the colorspace gamut |
double av_csp_approximate_trc_gamma | ( | enum AVColorTransferCharacteristic | trc | ) |
Determine a suitable 'gamma' value to match the supplied AVColorTransferCharacteristic.
See Apple Technical Note TN2257 (https://developer.apple.com/library/mac/technotes/tn2257/_index.html)
This function returns the gamma exponent for the OETF. For example, sRGB is approximated by gamma 2.2, not by gamma 0.45455.
av_csp_trc_function av_csp_trc_func_from_id | ( | enum AVColorTransferCharacteristic | trc | ) |
Determine the function needed to apply the given AVColorTransferCharacteristic to linear input.
The function returned should expect a nominal domain and range of [0.0-1.0] values outside of this range maybe valid depending on the chosen characteristic function.